[PATCH 8/10] Remove unnecessary NULL checks

Mike Halcrow
2006-05-26T14:22:10Z

Remove unnecessary checks for NULL for values that should never be
NULL. A couple of minor comment/spacing fixes.

Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>

---

fs/ecryptfs/dentry.c | 4 ----
fs/ecryptfs/file.c | 24 ++++--------------------
fs/ecryptfs/inode.c | 18 ------------------
fs/ecryptfs/mmap.c | 7 -------
fs/ecryptfs/super.c | 3 ---
5 files changed, 4 insertions(+), 52 deletions(-)

080439fe5ee41e1cff6f947722c7be027c295583
diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index 12362c0..7b1018a 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -47,10 +47,6 @@ static int ecryptfs_d_revalidate(struct
struct vfsmount *saved_vfsmount;

lower_dentry = ecryptfs_dentry_to_lower(dentry);
- if (!lower_dentry) {
- err = 0;
- goto out;
- }
if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
goto out;
saved_dentry = nd->dentry;
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index b8fcd0a..3a9cd15 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -337,12 +337,6 @@ ecryptfs_fsync(struct file *file, struct
mutex_unlock(&lower_dentry->d_inode->i_mutex);
}
} else {
- if (!ecryptfs_file_to_private(file)) {
- rc = -EINVAL;
- ecryptfs_printk(KERN_ERR, "ecryptfs_file_to_private"
- "(file=[%p]) is NULL\n", file);
- goto out;
- }
lower_file = ecryptfs_file_to_lower(file);
lower_dentry = ecryptfs_dentry_to_lower(dentry);
if (lower_file->f_op && lower_file->f_op->fsync) {
@@ -352,7 +346,6 @@ ecryptfs_fsync(struct file *file, struct
mutex_unlock(&lower_dentry->d_inode->i_mutex);
}
}
-out:
return rc;
}

@@ -466,15 +459,9 @@ static int ecryptfs_fasync(int fd, struc
int rc = 0;
struct file *lower_file = NULL;

- if (NULL != ecryptfs_file_to_private(file))
- lower_file = ecryptfs_file_to_lower(file);
- else {
- rc = -EINVAL;
- goto out;
- }
+ lower_file = ecryptfs_file_to_lower(file);
if (lower_file->f_op && lower_file->f_op->fasync)
rc = lower_file->f_op->fasync(fd, lower_file, flag);
-out:
return rc;
}

@@ -483,9 +470,7 @@ static int ecryptfs_lock(struct file *fi
int rc = 0;
struct file *lower_file = NULL;

- if (ecryptfs_file_to_private(file))
- lower_file = ecryptfs_file_to_lower(file);
- BUG_ON(!lower_file);
+ lower_file = ecryptfs_file_to_lower(file);
rc = -EINVAL;
if (!fl)
goto out;
@@ -513,9 +498,7 @@ static ssize_t ecryptfs_sendfile(struct
struct file *lower_file = NULL;
int rc = -EINVAL;

- if (ecryptfs_file_to_private(file))
- lower_file = ecryptfs_file_to_lower(file);
- BUG_ON(!lower_file);
+ lower_file = ecryptfs_file_to_lower(file);
if (lower_file->f_op && lower_file->f_op->sendfile)
rc = lower_file->f_op->sendfile(lower_file, ppos, count,
actor, target);
@@ -561,6 +544,7 @@ ecryptfs_ioctl(struct inode *inode, stru
{
int rc = 0;
struct file *lower_file = NULL;
+
if (ecryptfs_file_to_private(file))
lower_file = ecryptfs_file_to_lower(file);
if (lower_file && lower_file->f_op && lower_file->f_op->ioctl)
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index c24b043..47e4202 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -159,12 +159,6 @@ ecryptfs_do_create(struct inode *directo
struct dentry *lower_dir_dentry;

lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
- if (IS_ERR(lower_dentry)) {
- ecryptfs_printk(KERN_ERR, "ecryptfs dentry doesn't know"
- "about its lower counterpart\n");
- rc = PTR_ERR(lower_dentry);
- goto out;
- }
lower_dir_dentry = lock_parent(lower_dentry);
if (unlikely(IS_ERR(lower_dir_dentry))) {
ecryptfs_printk(KERN_ERR, "Error locking directory of "
@@ -252,12 +246,6 @@ static int ecryptfs_initialize_file(stru
struct vfsmount *lower_mnt;

lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
- if (IS_ERR(lower_dentry)) {
- ecryptfs_printk(KERN_ERR, "ecryptfs dentry doesn't know"
- "about its lower counterpart\n");
- rc = PTR_ERR(lower_dentry);
- goto out;
- }
ecryptfs_printk(KERN_DEBUG, "lower_dentry->d_name.name = [%s]\n",
lower_dentry->d_name.name);
inode = ecryptfs_dentry->d_inode;
@@ -831,12 +819,6 @@ int ecryptfs_truncate(struct dentry *den
if (unlikely((new_length == i_size)))
goto out;
crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
- if (unlikely(!crypt_stat)) {
- ecryptfs_printk(KERN_ERR, "NULL crypt_stat on dentry with "
- "d_name.name = [%s]\n", dentry->d_name.name);
- rc = -EINVAL;
- goto out;
- }
/* Set up a fake ecryptfs file, this is used to interface with
* the file in the underlying filesystem so that the
* truncation has an effect there as well. */
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 0c0411a..e9cff02 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -219,11 +219,6 @@ int ecryptfs_do_readpage(struct file *fi
const struct address_space_operations *lower_a_ops;

dentry = file->f_dentry;
- if (!ecryptfs_file_to_private(file)) {
- rc = -ENOENT;
- ecryptfs_printk(KERN_ERR, "No lower file info\n");
- goto out;
- }
lower_file = ecryptfs_file_to_lower(file);
lower_dentry = ecryptfs_dentry_to_lower(dentry);
inode = dentry->d_inode;
@@ -646,8 +641,6 @@ static int ecryptfs_commit_write(struct
mutex_lock(&lower_inode->i_mutex);
crypt_stat =
&ecryptfs_inode_to_private(file->f_dentry->d_inode)->crypt_stat;
- BUG_ON(!crypt_stat);
- BUG_ON(!lower_file);
if (ECRYPTFS_CHECK_FLAG(crypt_stat->flags, ECRYPTFS_NEW_FILE)) {
ecryptfs_printk(KERN_DEBUG, "ECRYPTFS_NEW_FILE flag set in "
"crypt_stat at memory location [%p]\n", crypt_stat);
diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c
index 1d344e0..94c50f1 100644
--- a/fs/ecryptfs/super.c
+++ b/fs/ecryptfs/super.c
@@ -37,9 +37,6 @@ struct kmem_cache *ecryptfs_inode_info_c
*
* Called to bring an inode into existence.
*
- * Note that setting the self referencing pointer doesn't work here:
- * i.e. ECRYPTFS_INODE_TO_PRIVATE_SM(inode) = ei;
- *
* Only handle allocation, setting up structures should be done in
* ecryptfs_read_inode. This is because the kernel, between now and
* then, will 0 out the private data pointer.
--
1.3.3